Rack



FIG. 1 is a top, front, right-side perspective view of a rack showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left-side elevational view, the right side elevational view being a mirror image thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom view thereof. 

The ornamental design for a rack, as shown and described. 